feat(pay-v2): P8 Task4 续费入账 invoice.paid→renewal order + subscription.renewed

internal/provider/stripe/stripe.go

@@ -180,20 +180,44 @@ func (p *Provider) VerifyCallback(_ context.Context, in provider.CallbackInput)
 	if err != nil {
 		return nil, fmt.Errorf("stripe: webhook 验签失败: %w", err)
 	}
-	if event.Type != "checkout.session.completed" {
+	switch event.Type {
+	case "checkout.session.completed":
+		var sess gostripe.CheckoutSession
+		if err := json.Unmarshal(event.Data.Raw, &sess); err != nil {
+			return nil, fmt.Errorf("stripe: 解析 session 失败: %w", err)
+		}
+		ev := sessionToEvent(&sess, in.Raw)
+		if event.Created > 0 {
+			paidAt := unixToTime(event.Created)
+			ev.PaidAt = &paidAt
+		}
+		return ev, nil
+	case "invoice.paid":
+		var inv gostripe.Invoice
+		if err := json.Unmarshal(event.Data.Raw, &inv); err != nil {
+			return nil, fmt.Errorf("stripe: 解析 invoice 失败: %w", err)
+		}
+		if inv.BillingReason != gostripe.InvoiceBillingReasonSubscriptionCycle {
+			// 首期(subscription_create)由 checkout.session.completed 入账;其余非续费忽略。
+			return &provider.PaidEvent{Kind: provider.EventPayment, Status: provider.PaidPending, Raw: string(in.Raw)}, nil
+		}
+		ev := &provider.PaidEvent{
+			Kind: provider.EventSubscriptionRenewal, Status: provider.PaidSucceeded,
+			InvoiceRef: inv.ID, PaidAmountMinor: inv.Total, PaidCurrency: strings.ToUpper(string(inv.Currency)),
+			Raw: string(in.Raw),
+		}
+		if inv.Subscription != nil {
+			ev.SubscriptionRef = inv.Subscription.ID
+		}
+		if event.Created > 0 {
+			t := unixToTime(event.Created)
+			ev.PaidAt = &t
+		}
+		return ev, nil
+	default:
 		// 其它事件此阶段不处理:归一化 pending(管线 Settle 视为 ignored)。
 		return &provider.PaidEvent{Status: provider.PaidPending, Raw: string(in.Raw)}, nil
 	}
-	var sess gostripe.CheckoutSession
-	if err := json.Unmarshal(event.Data.Raw, &sess); err != nil {
-		return nil, fmt.Errorf("stripe: 解析 session 失败: %w", err)
-	}
-	ev := sessionToEvent(&sess, in.Raw)
-	if event.Created > 0 {
-		paidAt := unixToTime(event.Created)
-		ev.PaidAt = &paidAt
-	}
-	return ev, nil
 }
 
 func (p *Provider) Query(_ context.Context, req provider.QueryRequest) (*provider.PaidEvent, error) {